Greek cosmography: The Greeks drafted a comprehensive worldview. Thales of Millet in 650 BC imagined the roundness of the Earth. One of his disciples, Anaximander, created a map of the world centered on the Mediterranean.
Shipwreck found with Viking sun stone An oblong crystal found in the wreck of a 16th-century English warship is a sunstone, a near-mythical navigational aid said to have been used by Viking mariners, researchers said on Wednesday.
Midgard is a realm in Norse mythology. Pictured as placed somewhere in the middle of Yggdrasil, Midgard is surrounded by a world of water, or ocean, that is impassable. The ocean is inhabited by the great sea serpent Jörmungandr (Miðgarðsormr), who is so huge that he encircles the world entirely, grasping his own tail. The concept is similar to that of the Ouroboros.